o7,
In "COL 173 SECTOR PF-E B28-3" system on planet "B 1" there appears to be
a bowl-type Guardian Structure with a weapon blueprint. And alpha and beta ruins also on the same planet.
The system has been in EDSM (coordinates: 870.34375 / -156.03125 / -92.84375) by "Saint Vlad" since Feb 14, 2017, 1:08:18 AM, but the planet is not. Universal Cartographics reports planet "B 1" as first discovered by "HOUDA-FORTIT".
System does not appear to be mentioned in publicly viewable Canonn material. Also, no google search hits for "COL 173 SECTOR PF-E B28-3".
Album of photos available
here
And invidual photos below
Air photo of structure
Air photo of alpha ruins
Air photo of beta ruins
Photo of planet lightside
Planet detail scan stats